Scientists have uncovered a new way to control magnets using flashes of light lasting less than a trillionth of a second. <\/p>\n
The approach triggers unusually large magnetic motion without direct contact or sustained energy input.<\/p>\n
Led by researchers at Lancaster University, the international team showed that subtle electronic effects can greatly amplify how magnets respond to ultrafast light.<\/p>\n
The findings deepen scientific understanding of magnetism at extreme speeds and could guide the design of faster, more efficient technologies.<\/p>\n
Scientists say the discovery reveals a fundamental mechanism that could reshape how magnetic states are controlled in future devices.<\/p>\n
Light-driven magnetic motion<\/p>\n
The team studied how extremely short electromagnetic pulses affect magnetization inside solid materials.<\/p>\n
These pulses briefly disturb the magnetic order, causing spins to tilt away from their original direction.<\/p>\n
Researchers tested two closely related magnetic materials.<\/p>\n
Each material shared similar properties but differed in the structure of its electronic orbitals. Orbitals describe how electrons move around an atomic nucleus.<\/p>\n
After exposing the materials to ultrafast light, the team analyzed the resulting magnetic state.<\/p>\n
They found a dramatic difference in how strongly each material responded.<\/p>\n
In one case, interaction between orbital motion and electron spin amplified the effect.<\/p>\n
The light pulse produced a spin deflection up to ten times larger than in the material lacking that interaction.<\/p>\n
This result shows that orbital motion plays a key role in magnetic control. It also reveals a highly efficient pathway for steering magnetization using light alone.<\/p>\n
Magnetism begins with electrons. As electrons orbit the nucleus and spin on their axis, each one acts like a tiny magnet, known as a spin. The collective behavior of these spins determines a material\u2019s magnetic direction.<\/p>\n
In solids, electrons interact with one another and with nearby atoms. These interactions lock spins into preferred orientations. They also define how easily external stimuli can move them.<\/p>\n
Light can influence both electron orbitals and spins. When orbital motion strongly couples to spin, the response becomes much stronger.<\/p>\n
The researchers showed that this coupling allows light to transfer angular momentum more efficiently.<\/p>\n
This mechanism enables rapid magnetization steering on ultrafast timescales. With sufficient control, the magnetization can shift far from equilibrium.<\/p>\n
In some cases, it can even reverse direction entirely.<\/p>\n
Such control lies at the heart of magnetic data storage, where information is encoded as \u201c0\u201d or \u201c1\u201d based on magnetic orientation.<\/p>\n
Implications for future devices<\/p>\n
Magnetic<\/a> materials remain central to modern technology. Data centers rely on them to store vast amounts of information.<\/p>\n Smartphones and computers use magnetic sensors for navigation and positioning.<\/p>\n Improving magnetic control could make these systems faster and more energy-efficient. Light-based techniques also reduce heat and power losses associated with electric currents.<\/p>\n Lead author Dr Rostislav Mikhaylovskiy highlighted the broader impact of the work.<\/p>\n \u201cWe believe that this exciting discovery will stimulate further studies of the mechanisms governing the efficient and rapid control of magnetization for future quantum<\/a> technologies.\u201d<\/p>\n Researchers plan to explore other materials with strong orbital-spin coupling.<\/p>\n They also aim to refine ultrafast optical methods for real-world applications.<\/p>\n The study shows that hidden electronic motion can unlock powerful new ways to manipulate magnets. <\/p>\n It brings scientists closer to controlling magnetic matter at the fastest possible speeds.<\/p>\n